I live in Southern California (Pasadena area) and, due to a small house
and anti-plant-people in same, need to move my orchids outside. Before
I do so, I'm thinking about what I'll need to set-up for the move to be
successful. Currently I have 5 phals and 1 oncidium cross (Colmanara
Wildcat) that are healthy, each seated over a humidity tray, with
plenty of light from their own window.

I've already discarded most beginner greenhouses b/c they don't allow
enough space between shelves, are too flimsy, or are too big. So I'm
planning to take an old desk, nail wood supports up from which to drape
humidity-trapping plastic and light-abating greenhouse netting, and
place the plants under that.

Will that work? Maybe I'm being paranoid, but I'm concerned that
extremes of cold (sometimes around 45 at night in winter) and heat
(sometimes around 100 in the summer) will kill them. Do you think I'll
need some sort of fan, heater, cooler system for them to thrive, or
will they be fine with just the light and humidity controls I
mentioned?

I really wish there were some kit for a 4' x 2' x 6' outdoor orchid
case that could really pamper them. Hmmm. Maybe that's what I should
do: enclose the walls with plexiglass, cut holes for computer-type
fans, and have a computer control the humidity, temp, etc. according to
a program.

As you can see, I need some practical guidance or I might under/over do
it. Any help appreciated. Thanks!

-Munir